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Earnings per Share (Tables) | 3 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share | The following table sets forth the calculation of basic and diluted net income per common share under the two-class method for the three months ended December 31, 2020 and 2019 (in millions, except share and per share data):
| Three Months Ended December 31,
| 2020 |  | 2019
| Class A |  | Class B |  | Class A |  | Class B
Basic and Diluted EPS: |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |
Net income attributable to Warner Music Group Corp. | $ | 19 |  |  | $ | 79 |  |  | $ | — |  |  | $ | 120 |
Less: Net income attributable to participating securities | (2) |  |  | — |  |  | — |  |  | — |
Net income attributable to common stockholders | $ | 17 |  |  | $ | 79 |  |  | $ | — |  |  | $ | 120 |
Denominator |  |  |  |  |  |  |
Weighted average shares outstanding | 94,221,946 |  |  | 416,632,808 |  |  | 0 |  |  | 501,991,944 |
Basic and Diluted EPS | $ | 0.18 |  |  | $ | 0.19 |  |  | $ | — |  |  | $ | 0.24 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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